associate's degree vs collegian

associate's degree

noun
  • An academic degree awarded after the equivalent of approximately two years of college education, usually by community colleges. 

collegian

noun
  • A student (or a former student) of a college 

  • An inmate of a prison. 

adj
  • Of or relating to a college or its students. 

How often have the words associate's degree and collegian occurred in a corpus of books? (source: Google Ngram Viewer )